000 00290nam a2200121Ia 4500
008 220201s1970 xx 000 0 eng d
082 _bBAL
100 _aBall,AM,Comp.
245 0 _aRadio valve and transistors data
260 _alondon
_bILIFEE books
_c1970
300 _a232
942 _2ddc
999 _c18753
_d18753